I need this 2 , thanks

3. The membrane surrounding a living cell consists of a phospholipid bilayer with various proteins that operate as channels or pumps for ions (example: a voltage-gated channel opens and closes based on potential difference). The bilayer itself can behave like a parallel plate capacitor, in which the effective charge density on the Inner and outer walls has a magnitude of 7.1 X 10% C/m. (A) What is the magnitude of the electric field within the cell membrane? (B) Find the Noah Res magnitude of the electric force that would be exerted on a potassium ion (K*= +e) placed Inside the membrane. 4. Two spherical shells have a common center. One charge (-1.6 X 10* C) is spread uniformly over the inner shell (radius of 0.05 m). The outer charge (+5.1 X 10. C) is spread uniformly over the outer shell (radius of 0.15 m). Find both the magnitude and direction of the electric field at a distance (measured from common center) of (A) 0.20 m, (B) 0.10 m, and (C) 0.025 m